Jetson Nano H264 to H265 transcode

[harrylee]

Hi.

I am new to the Jetson Nano and would like to seek kind advice from members.

I have been trying to use the gstreamer to transcode existing H264 mp4 files to H265 mp4 files with reference from the development guide posted by Nvidia.

The pipeline I created is as below:

gst-launch-1.0 -e filesrc location=./h264_input.mp4
! qtdemux name=demux
! h264parse ! nvv4l2decoder ! nvv4l2h265enc bitrate=4000000
! h265parse
! progressreport update-freq=1
! qtmux name=mux
! filesink location=./h265_output.mp4

However, the above pipeline only transcode the video stream of the mp4 file and it seems that I have to write some pipeline for the audio stream as well.

Can any one share their advice or some good reference guide for creating such pipeline? Many thanks!

[DaneLLL]

Hi,
Please refer to audio part in this pipeline and apply to yours:

Convert .ts file to .mp4

Hi, For using gstreamer pipeline, please try $ gst-launch-1.0 qtmux name=mx ! filesink location=test.mp4 filesrc location= test.ts ! tsdemux name=dmx dmx. ! queue ! h264parse ! mx. dmx. ! queue ! aacparse ! faad ! audioresample ! audioconvert ! voaacenc ! mx. Somehow audio stream has to be decompressed and compressed again. This may take more CPU usage than ffmpeg. For ffmpeg with hardware acceleration, please check Jetson Nano FAQ Q: Is hardware acceleration enabled in ffmpeg?

[harrylee]

Thanks for the information. I have came up with the following pipeline that get the job done, posted here for other’s reference:

gst-launch-1.0 -e qtmux name=mx ! progressreport update-freq=1
! filesink location=output.mp4 filesrc location=input.mp4
! qtdemux name=dmx
dmx. ! queue ! h264parse ! nvv4l2decoder ! nvv4l2h265enc bitrate=4000000 ! h265parse ! mx.
dmx. ! queue ! aacparse ! faad ! audioresample ! audioconvert ! voaacenc ! mx.